/**
 *  Copyright 2009 Henning Teek, Ingo Renner
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License. 
 */
package com.googlecode.chigs.web.common;


import org.apache.wicket.Component;
import org.apache.wicket.ResourceReference;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.protocol.http.WicketURLEncoder;
import org.apache.wicket.request.target.resource.ResourceStreamRequestTarget;
import org.apache.wicket.util.file.File;
import org.apache.wicket.util.resource.IResourceStream;
import org.apache.wicket.util.resource.ZipResourceStream;
import org.apache.wicket.util.string.Strings;

/**
 * 
 * @author Ingo Renner
 * @author Henning Teek
 *
 */
public abstract class ZipDownloadActionLink extends AActionLink {

	private final String fileName;
	
	public ZipDownloadActionLink(String fileName) {
		super(false);
		if (Strings.isEmpty(fileName)) {
			throw new IllegalArgumentException("fileName cannot be an empty string");
		}
		this.fileName = WicketURLEncoder.QUERY_INSTANCE.encode(fileName);
	}

	@Override
	protected ResourceReference getIcon() {
		return IconFactory.createZipIconReference();
	}

	@Override
	public void onClick(AjaxRequestTarget target) {
		try {
			final File file = new File(getFile());
			final IResourceStream resourceStream = new ZipResourceStream(file, true);
			getRequestCycle().setRequestTarget(new ResourceStreamRequestTarget(resourceStream) {
				@Override
				public String getFileName() 	{
					return fileName;
				}
			});
		} catch (MessageException e) {
			getSession().error(e.getMessage());
		}
	}
	
	public abstract java.io.File getFile() throws MessageException;
}
